1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB 4 // video capture devices 5 // 6 // Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it> 7 // Markus Rechberger <mrechberger@gmail.com> 8 // Mauro Carvalho Chehab <mchehab@kernel.org> 9 // Sascha Sommer <saschasommer@freenet.de> 10 // Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com> 11 // 12 // Some parts based on SN9C10x PC Camera Controllers GPL driver made 13 // by Luca Risolia <luca.risolia@studio.unibo.it> 14 // 15 // This program is free software; you can redistribute it and/or modify 16 // it under the terms of the GNU General Public License as published by 17 // the Free Software Foundation; either version 2 of the License, or 18 // (at your option) any later version. 19 // 20 // This program is distributed in the hope that it will be useful, 21 // but WITHOUT ANY WARRANTY; without even the implied warranty of 22 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 // GNU General Public License for more details. 24 25 #include "em28xx.h" 26 27 #include <linux/init.h> 28 #include <linux/list.h> 29 #include <linux/module.h> 30 #include <linux/kernel.h> 31 #include <linux/bitmap.h> 32 #include <linux/usb.h> 33 #include <linux/i2c.h> 34 #include <linux/mm.h> 35 #include <linux/mutex.h> 36 #include <linux/slab.h> 37 38 #include "em28xx-v4l.h" 39 #include <media/v4l2-common.h> 40 #include <media/v4l2-ioctl.h> 41 #include <media/v4l2-event.h> 42 #include <media/drv-intf/msp3400.h> 43 #include <media/tuner.h> 44 45 #define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \ 46 "Markus Rechberger <mrechberger@gmail.com>, " \ 47 "Mauro Carvalho Chehab <mchehab@kernel.org>, " \ 48 "Sascha Sommer <saschasommer@freenet.de>" 49 50 static unsigned int isoc_debug; 51 module_param(isoc_debug, int, 0644); 52 MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]"); 53 54 static unsigned int disable_vbi; 55 module_param(disable_vbi, int, 0644); 56 MODULE_PARM_DESC(disable_vbi, "disable vbi support"); 57 58 static int alt; 59 module_param(alt, int, 0644); 60 MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint"); 61 62 #define em28xx_videodbg(fmt, arg...) do { \ 63 if (video_debug) \ 64 dev_printk(KERN_DEBUG, &dev->intf->dev, \ 65 "video: %s: " fmt, __func__, ## arg); \ 66 } while (0) 67 68 #define em28xx_isocdbg(fmt, arg...) do {\ 69 if (isoc_debug) \ 70 dev_printk(KERN_DEBUG, &dev->intf->dev, \ 71 "isoc: %s: " fmt, __func__, ## arg); \ 72 } while (0) 73 74 MODULE_AUTHOR(DRIVER_AUTHOR); 75 MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface"); 76 MODULE_LICENSE("GPL v2"); 77 MODULE_VERSION(EM28XX_VERSION); 78 79 #define EM25XX_FRMDATAHDR_BYTE1 0x02 80 #define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE 0x20 81 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_END 0x02 82 #define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID 0x01 83 #define EM25XX_FRMDATAHDR_BYTE2_MASK (EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE | \ 84 EM25XX_FRMDATAHDR_BYTE2_FRAME_END | \ 85 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID) 86 87 static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 88 static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 89 static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U }; 90 91 module_param_array(video_nr, int, NULL, 0444); 92 module_param_array(vbi_nr, int, NULL, 0444); 93 module_param_array(radio_nr, int, NULL, 0444); 94 MODULE_PARM_DESC(video_nr, "video device numbers"); 95 MODULE_PARM_DESC(vbi_nr, "vbi device numbers"); 96 MODULE_PARM_DESC(radio_nr, "radio device numbers"); 97 98 static unsigned int video_debug; 99 module_param(video_debug, int, 0644); 100 MODULE_PARM_DESC(video_debug, "enable debug messages [video]"); 101 102 /* supported video standards */ 103 static struct em28xx_fmt format[] = { 104 { 105 .name = "16 bpp YUY2, 4:2:2, packed", 106 .fourcc = V4L2_PIX_FMT_YUYV, 107 .depth = 16, 108 .reg = EM28XX_OUTFMT_YUV422_Y0UY1V, 109 }, { 110 .name = "16 bpp RGB 565, LE", 111 .fourcc = V4L2_PIX_FMT_RGB565, 112 .depth = 16, 113 .reg = EM28XX_OUTFMT_RGB_16_656, 114 }, { 115 .name = "8 bpp Bayer RGRG..GBGB", 116 .fourcc = V4L2_PIX_FMT_SRGGB8, 117 .depth = 8, 118 .reg = EM28XX_OUTFMT_RGB_8_RGRG, 119 }, { 120 .name = "8 bpp Bayer BGBG..GRGR", 121 .fourcc = V4L2_PIX_FMT_SBGGR8, 122 .depth = 8, 123 .reg = EM28XX_OUTFMT_RGB_8_BGBG, 124 }, { 125 .name = "8 bpp Bayer GRGR..BGBG", 126 .fourcc = V4L2_PIX_FMT_SGRBG8, 127 .depth = 8, 128 .reg = EM28XX_OUTFMT_RGB_8_GRGR, 129 }, { 130 .name = "8 bpp Bayer GBGB..RGRG", 131 .fourcc = V4L2_PIX_FMT_SGBRG8, 132 .depth = 8, 133 .reg = EM28XX_OUTFMT_RGB_8_GBGB, 134 }, { 135 .name = "12 bpp YUV411", 136 .fourcc = V4L2_PIX_FMT_YUV411P, 137 .depth = 12, 138 .reg = EM28XX_OUTFMT_YUV411, 139 }, 140 }; 141 142 /*FIXME: maxw should be dependent of alt mode */ 143 static inline unsigned int norm_maxw(struct em28xx *dev) 144 { 145 struct em28xx_v4l2 *v4l2 = dev->v4l2; 146 147 if (dev->is_webcam) 148 return v4l2->sensor_xres; 149 150 if (dev->board.max_range_640_480) 151 return 640; 152 153 return 720; 154 } 155 156 static inline unsigned int norm_maxh(struct em28xx *dev) 157 { 158 struct em28xx_v4l2 *v4l2 = dev->v4l2; 159 160 if (dev->is_webcam) 161 return v4l2->sensor_yres; 162 163 if (dev->board.max_range_640_480) 164 return 480; 165 166 return (v4l2->norm & V4L2_STD_625_50) ? 576 : 480; 167 } 168 169 static int em28xx_vbi_supported(struct em28xx *dev) 170 { 171 /* Modprobe option to manually disable */ 172 if (disable_vbi == 1) 173 return 0; 174 175 if (dev->is_webcam) 176 return 0; 177 178 /* FIXME: check subdevices for VBI support */ 179 180 if (dev->chip_id == CHIP_ID_EM2860 || 181 dev->chip_id == CHIP_ID_EM2883) 182 return 1; 183 184 /* Version of em28xx that does not support VBI */ 185 return 0; 186 } 187 188 /* 189 * em28xx_wake_i2c() 190 * configure i2c attached devices 191 */ 192 static void em28xx_wake_i2c(struct em28xx *dev) 193 { 194 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev; 195 196 v4l2_device_call_all(v4l2_dev, 0, core, reset, 0); 197 v4l2_device_call_all(v4l2_dev, 0, video, s_routing, 198 INPUT(dev->ctl_input)->vmux, 0, 0); 199 } 200 201 static int em28xx_colorlevels_set_default(struct em28xx *dev) 202 { 203 em28xx_write_reg(dev, EM28XX_R20_YGAIN, CONTRAST_DEFAULT); 204 em28xx_write_reg(dev, EM28XX_R21_YOFFSET, BRIGHTNESS_DEFAULT); 205 em28xx_write_reg(dev, EM28XX_R22_UVGAIN, SATURATION_DEFAULT); 206 em28xx_write_reg(dev, EM28XX_R23_UOFFSET, BLUE_BALANCE_DEFAULT); 207 em28xx_write_reg(dev, EM28XX_R24_VOFFSET, RED_BALANCE_DEFAULT); 208 em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, SHARPNESS_DEFAULT); 209 210 em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20); 211 em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20); 212 em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20); 213 em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20); 214 em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00); 215 em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00); 216 return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00); 217 } 218 219 static int em28xx_set_outfmt(struct em28xx *dev) 220 { 221 int ret; 222 u8 fmt, vinctrl; 223 struct em28xx_v4l2 *v4l2 = dev->v4l2; 224 225 fmt = v4l2->format->reg; 226 if (!dev->is_em25xx) 227 fmt |= 0x20; 228 /* 229 * NOTE: it's not clear if this is really needed ! 230 * The datasheets say bit 5 is a reserved bit and devices seem to work 231 * fine without it. But the Windows driver sets it for em2710/50+em28xx 232 * devices and we've always been setting it, too. 233 * 234 * em2765 (em25xx, em276x/7x/8x) devices do NOT work with this bit set, 235 * it's likely used for an additional (compressed ?) format there. 236 */ 237 ret = em28xx_write_reg(dev, EM28XX_R27_OUTFMT, fmt); 238 if (ret < 0) 239 return ret; 240 241 ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, v4l2->vinmode); 242 if (ret < 0) 243 return ret; 244 245 vinctrl = v4l2->vinctl; 246 if (em28xx_vbi_supported(dev) == 1) { 247 vinctrl |= EM28XX_VINCTRL_VBI_RAW; 248 em28xx_write_reg(dev, EM28XX_R34_VBI_START_H, 0x00); 249 em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH, 250 v4l2->vbi_width / 4); 251 em28xx_write_reg(dev, EM28XX_R37_VBI_HEIGHT, v4l2->vbi_height); 252 if (v4l2->norm & V4L2_STD_525_60) { 253 /* NTSC */ 254 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x09); 255 } else if (v4l2->norm & V4L2_STD_625_50) { 256 /* PAL */ 257 em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x07); 258 } 259 } 260 261 return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctrl); 262 } 263 264 static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax, 265 u8 ymin, u8 ymax) 266 { 267 em28xx_videodbg("em28xx Scale: (%d,%d)-(%d,%d)\n", 268 xmin, ymin, xmax, ymax); 269 270 em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1); 271 em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1); 272 em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1); 273 return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1); 274 } 275 276 static void em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart, 277 u16 width, u16 height) 278 { 279 u8 cwidth = width >> 2; 280 u8 cheight = height >> 2; 281 u8 overflow = (height >> 9 & 0x02) | (width >> 10 & 0x01); 282 /* NOTE: size limit: 2047x1023 = 2MPix */ 283 284 em28xx_videodbg("capture area set to (%d,%d): %dx%d\n", 285 hstart, vstart, 286 ((overflow & 2) << 9 | cwidth << 2), 287 ((overflow & 1) << 10 | cheight << 2)); 288 289 em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1); 290 em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1); 291 em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1); 292 em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1); 293 em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1); 294 295 /* FIXME: function/meaning of these registers ? */ 296 /* FIXME: align width+height to multiples of 4 ?! */ 297 if (dev->is_em25xx) { 298 em28xx_write_reg(dev, 0x34, width >> 4); 299 em28xx_write_reg(dev, 0x35, height >> 4); 300 } 301 } 302 303 static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v) 304 { 305 u8 mode = 0x00; 306 /* the em2800 scaler only supports scaling down to 50% */ 307 308 if (dev->board.is_em2800) { 309 mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00); 310 } else { 311 u8 buf[2]; 312 313 buf[0] = h; 314 buf[1] = h >> 8; 315 em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2); 316 317 buf[0] = v; 318 buf[1] = v >> 8; 319 em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2); 320 /* 321 * it seems that both H and V scalers must be active 322 * to work correctly 323 */ 324 mode = (h || v) ? 0x30 : 0x00; 325 } 326 return em28xx_write_reg(dev, EM28XX_R26_COMPR, mode); 327 } 328 329 /* FIXME: this only function read values from dev */ 330 static int em28xx_resolution_set(struct em28xx *dev) 331 { 332 struct em28xx_v4l2 *v4l2 = dev->v4l2; 333 int width = norm_maxw(dev); 334 int height = norm_maxh(dev); 335 336 /* Properly setup VBI */ 337 v4l2->vbi_width = 720; 338 if (v4l2->norm & V4L2_STD_525_60) 339 v4l2->vbi_height = 12; 340 else 341 v4l2->vbi_height = 18; 342 343 em28xx_set_outfmt(dev); 344 345 em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2); 346 347 /* 348 * If we don't set the start position to 2 in VBI mode, we end up 349 * with line 20/21 being YUYV encoded instead of being in 8-bit 350 * greyscale. The core of the issue is that line 21 (and line 23 for 351 * PAL WSS) are inside of active video region, and as a result they 352 * get the pixelformatting associated with that area. So by cropping 353 * it out, we end up with the same format as the rest of the VBI 354 * region 355 */ 356 if (em28xx_vbi_supported(dev) == 1) 357 em28xx_capture_area_set(dev, 0, 2, width, height); 358 else 359 em28xx_capture_area_set(dev, 0, 0, width, height); 360 361 return em28xx_scaler_set(dev, v4l2->hscale, v4l2->vscale); 362 } 363 364 /* Set USB alternate setting for analog video */ 365 static int em28xx_set_alternate(struct em28xx *dev) 366 { 367 struct em28xx_v4l2 *v4l2 = dev->v4l2; 368 struct usb_device *udev = interface_to_usbdev(dev->intf); 369 int err; 370 int i; 371 unsigned int min_pkt_size = v4l2->width * 2 + 4; 372 373 /* 374 * NOTE: for isoc transfers, only alt settings > 0 are allowed 375 * bulk transfers seem to work only with alt=0 ! 376 */ 377 dev->alt = 0; 378 if (alt > 0 && alt < dev->num_alt) { 379 em28xx_videodbg("alternate forced to %d\n", dev->alt); 380 dev->alt = alt; 381 goto set_alt; 382 } 383 if (dev->analog_xfer_bulk) 384 goto set_alt; 385 386 /* 387 * When image size is bigger than a certain value, 388 * the frame size should be increased, otherwise, only 389 * green screen will be received. 390 */ 391 if (v4l2->width * 2 * v4l2->height > 720 * 240 * 2) 392 min_pkt_size *= 2; 393 394 for (i = 0; i < dev->num_alt; i++) { 395 /* stop when the selected alt setting offers enough bandwidth */ 396 if (dev->alt_max_pkt_size_isoc[i] >= min_pkt_size) { 397 dev->alt = i; 398 break; 399 /* 400 * otherwise make sure that we end up with the maximum 401 * bandwidth because the min_pkt_size equation might be wrong. 402 * 403 */ 404 } else if (dev->alt_max_pkt_size_isoc[i] > 405 dev->alt_max_pkt_size_isoc[dev->alt]) 406 dev->alt = i; 407 } 408 409 set_alt: 410 /* 411 * NOTE: for bulk transfers, we need to call usb_set_interface() 412 * even if the previous settings were the same. Otherwise streaming 413 * fails with all urbs having status = -EOVERFLOW ! 414 */ 415 if (dev->analog_xfer_bulk) { 416 dev->max_pkt_size = 512; /* USB 2.0 spec */ 417 dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER; 418 } else { /* isoc */ 419 em28xx_videodbg("minimum isoc packet size: %u (alt=%d)\n", 420 min_pkt_size, dev->alt); 421 dev->max_pkt_size = 422 dev->alt_max_pkt_size_isoc[dev->alt]; 423 dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS; 424 } 425 em28xx_videodbg("setting alternate %d with wMaxPacketSize=%u\n", 426 dev->alt, dev->max_pkt_size); 427 err = usb_set_interface(udev, dev->ifnum, dev->alt); 428 if (err < 0) { 429 dev_err(&dev->intf->dev, 430 "cannot change alternate number to %d (error=%i)\n", 431 dev->alt, err); 432 return err; 433 } 434 return 0; 435 } 436 437 /* 438 * DMA and thread functions 439 */ 440 441 /* 442 * Finish the current buffer 443 */ 444 static inline void finish_buffer(struct em28xx *dev, 445 struct em28xx_buffer *buf) 446 { 447 em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field); 448 449 buf->vb.sequence = dev->v4l2->field_count++; 450 if (dev->v4l2->progressive) 451 buf->vb.field = V4L2_FIELD_NONE; 452 else 453 buf->vb.field = V4L2_FIELD_INTERLACED; 454 buf->vb.vb2_buf.timestamp = ktime_get_ns(); 455 456 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE); 457 } 458 459 /* 460 * Copy picture data from USB buffer to videobuf buffer 461 */ 462 static void em28xx_copy_video(struct em28xx *dev, 463 struct em28xx_buffer *buf, 464 unsigned char *usb_buf, 465 unsigned long len) 466 { 467 struct em28xx_v4l2 *v4l2 = dev->v4l2; 468 void *fieldstart, *startwrite, *startread; 469 int linesdone, currlinedone, offset, lencopy, remain; 470 int bytesperline = v4l2->width << 1; 471 472 if (buf->pos + len > buf->length) 473 len = buf->length - buf->pos; 474 475 startread = usb_buf; 476 remain = len; 477 478 if (v4l2->progressive || buf->top_field) 479 fieldstart = buf->vb_buf; 480 else /* interlaced mode, even nr. of lines */ 481 fieldstart = buf->vb_buf + bytesperline; 482 483 linesdone = buf->pos / bytesperline; 484 currlinedone = buf->pos % bytesperline; 485 486 if (v4l2->progressive) 487 offset = linesdone * bytesperline + currlinedone; 488 else 489 offset = linesdone * bytesperline * 2 + currlinedone; 490 491 startwrite = fieldstart + offset; 492 lencopy = bytesperline - currlinedone; 493 lencopy = lencopy > remain ? remain : lencopy; 494 495 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) { 496 em28xx_isocdbg("Overflow of %zu bytes past buffer end (1)\n", 497 ((char *)startwrite + lencopy) - 498 ((char *)buf->vb_buf + buf->length)); 499 remain = (char *)buf->vb_buf + buf->length - 500 (char *)startwrite; 501 lencopy = remain; 502 } 503 if (lencopy <= 0) 504 return; 505 memcpy(startwrite, startread, lencopy); 506 507 remain -= lencopy; 508 509 while (remain > 0) { 510 if (v4l2->progressive) 511 startwrite += lencopy; 512 else 513 startwrite += lencopy + bytesperline; 514 startread += lencopy; 515 if (bytesperline > remain) 516 lencopy = remain; 517 else 518 lencopy = bytesperline; 519 520 if ((char *)startwrite + lencopy > (char *)buf->vb_buf + 521 buf->length) { 522 em28xx_isocdbg("Overflow of %zu bytes past buffer end(2)\n", 523 ((char *)startwrite + lencopy) - 524 ((char *)buf->vb_buf + buf->length)); 525 remain = (char *)buf->vb_buf + buf->length - 526 (char *)startwrite; 527 lencopy = remain; 528 } 529 if (lencopy <= 0) 530 break; 531 532 memcpy(startwrite, startread, lencopy); 533 534 remain -= lencopy; 535 } 536 537 buf->pos += len; 538 } 539 540 /* 541 * Copy VBI data from USB buffer to videobuf buffer 542 */ 543 static void em28xx_copy_vbi(struct em28xx *dev, 544 struct em28xx_buffer *buf, 545 unsigned char *usb_buf, 546 unsigned long len) 547 { 548 unsigned int offset; 549 550 if (buf->pos + len > buf->length) 551 len = buf->length - buf->pos; 552 553 offset = buf->pos; 554 /* Make sure the bottom field populates the second half of the frame */ 555 if (buf->top_field == 0) 556 offset += dev->v4l2->vbi_width * dev->v4l2->vbi_height; 557 558 memcpy(buf->vb_buf + offset, usb_buf, len); 559 buf->pos += len; 560 } 561 562 static inline void print_err_status(struct em28xx *dev, 563 int packet, int status) 564 { 565 char *errmsg = "Unknown"; 566 567 switch (status) { 568 case -ENOENT: 569 errmsg = "unlinked synchronously"; 570 break; 571 case -ECONNRESET: 572 errmsg = "unlinked asynchronously"; 573 break; 574 case -ENOSR: 575 errmsg = "Buffer error (overrun)"; 576 break; 577 case -EPIPE: 578 errmsg = "Stalled (device not responding)"; 579 break; 580 case -EOVERFLOW: 581 errmsg = "Babble (bad cable?)"; 582 break; 583 case -EPROTO: 584 errmsg = "Bit-stuff error (bad cable?)"; 585 break; 586 case -EILSEQ: 587 errmsg = "CRC/Timeout (could be anything)"; 588 break; 589 case -ETIME: 590 errmsg = "Device does not respond"; 591 break; 592 } 593 if (packet < 0) { 594 em28xx_isocdbg("URB status %d [%s].\n", status, errmsg); 595 } else { 596 em28xx_isocdbg("URB packet %d, status %d [%s].\n", 597 packet, status, errmsg); 598 } 599 } 600 601 /* 602 * get the next available buffer from dma queue 603 */ 604 static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev, 605 struct em28xx_dmaqueue *dma_q) 606 { 607 struct em28xx_buffer *buf; 608 609 if (list_empty(&dma_q->active)) { 610 em28xx_isocdbg("No active queue to serve\n"); 611 return NULL; 612 } 613 614 /* Get the next buffer */ 615 buf = list_entry(dma_q->active.next, struct em28xx_buffer, list); 616 /* Cleans up buffer - Useful for testing for frame/URB loss */ 617 list_del(&buf->list); 618 buf->pos = 0; 619 buf->vb_buf = buf->mem; 620 621 return buf; 622 } 623 624 /* 625 * Finish the current buffer if completed and prepare for the next field 626 */ 627 static struct em28xx_buffer * 628 finish_field_prepare_next(struct em28xx *dev, 629 struct em28xx_buffer *buf, 630 struct em28xx_dmaqueue *dma_q) 631 { 632 struct em28xx_v4l2 *v4l2 = dev->v4l2; 633 634 if (v4l2->progressive || v4l2->top_field) { /* Brand new frame */ 635 if (buf) 636 finish_buffer(dev, buf); 637 buf = get_next_buf(dev, dma_q); 638 } 639 if (buf) { 640 buf->top_field = v4l2->top_field; 641 buf->pos = 0; 642 } 643 644 return buf; 645 } 646 647 /* 648 * Process data packet according to the em2710/em2750/em28xx frame data format 649 */ 650 static inline void process_frame_data_em28xx(struct em28xx *dev, 651 unsigned char *data_pkt, 652 unsigned int data_len) 653 { 654 struct em28xx_v4l2 *v4l2 = dev->v4l2; 655 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf; 656 struct em28xx_buffer *vbi_buf = dev->usb_ctl.vbi_buf; 657 struct em28xx_dmaqueue *dma_q = &dev->vidq; 658 struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq; 659 660 /* 661 * capture type 0 = vbi start 662 * capture type 1 = vbi in progress 663 * capture type 2 = video start 664 * capture type 3 = video in progress 665 */ 666 if (data_len >= 4) { 667 /* 668 * NOTE: Headers are always 4 bytes and 669 * never split across packets 670 */ 671 if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 && 672 data_pkt[2] == 0x88 && data_pkt[3] == 0x88) { 673 /* Continuation */ 674 data_pkt += 4; 675 data_len -= 4; 676 } else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) { 677 /* Field start (VBI mode) */ 678 v4l2->capture_type = 0; 679 v4l2->vbi_read = 0; 680 em28xx_isocdbg("VBI START HEADER !!!\n"); 681 v4l2->top_field = !(data_pkt[2] & 1); 682 data_pkt += 4; 683 data_len -= 4; 684 } else if (data_pkt[0] == 0x22 && data_pkt[1] == 0x5a) { 685 /* Field start (VBI disabled) */ 686 v4l2->capture_type = 2; 687 em28xx_isocdbg("VIDEO START HEADER !!!\n"); 688 v4l2->top_field = !(data_pkt[2] & 1); 689 data_pkt += 4; 690 data_len -= 4; 691 } 692 } 693 /* 694 * NOTE: With bulk transfers, intermediate data packets 695 * have no continuation header 696 */ 697 698 if (v4l2->capture_type == 0) { 699 vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q); 700 dev->usb_ctl.vbi_buf = vbi_buf; 701 v4l2->capture_type = 1; 702 } 703 704 if (v4l2->capture_type == 1) { 705 int vbi_size = v4l2->vbi_width * v4l2->vbi_height; 706 int vbi_data_len = ((v4l2->vbi_read + data_len) > vbi_size) ? 707 (vbi_size - v4l2->vbi_read) : data_len; 708 709 /* Copy VBI data */ 710 if (vbi_buf) 711 em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len); 712 v4l2->vbi_read += vbi_data_len; 713 714 if (vbi_data_len < data_len) { 715 /* Continue with copying video data */ 716 v4l2->capture_type = 2; 717 data_pkt += vbi_data_len; 718 data_len -= vbi_data_len; 719 } 720 } 721 722 if (v4l2->capture_type == 2) { 723 buf = finish_field_prepare_next(dev, buf, dma_q); 724 dev->usb_ctl.vid_buf = buf; 725 v4l2->capture_type = 3; 726 } 727 728 if (v4l2->capture_type == 3 && buf && data_len > 0) 729 em28xx_copy_video(dev, buf, data_pkt, data_len); 730 } 731 732 /* 733 * Process data packet according to the em25xx/em276x/7x/8x frame data format 734 */ 735 static inline void process_frame_data_em25xx(struct em28xx *dev, 736 unsigned char *data_pkt, 737 unsigned int data_len) 738 { 739 struct em28xx_buffer *buf = dev->usb_ctl.vid_buf; 740 struct em28xx_dmaqueue *dmaq = &dev->vidq; 741 struct em28xx_v4l2 *v4l2 = dev->v4l2; 742 bool frame_end = false; 743 744 /* Check for header */ 745 /* 746 * NOTE: at least with bulk transfers, only the first packet 747 * has a header and has always set the FRAME_END bit 748 */ 749 if (data_len >= 2) { /* em25xx header is only 2 bytes long */ 750 if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) && 751 ((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) { 752 v4l2->top_field = !(data_pkt[1] & 753 EM25XX_FRMDATAHDR_BYTE2_FRAME_ID); 754 frame_end = data_pkt[1] & 755 EM25XX_FRMDATAHDR_BYTE2_FRAME_END; 756 data_pkt += 2; 757 data_len -= 2; 758 } 759 760 /* Finish field and prepare next (BULK only) */ 761 if (dev->analog_xfer_bulk && frame_end) { 762 buf = finish_field_prepare_next(dev, buf, dmaq); 763 dev->usb_ctl.vid_buf = buf; 764 } 765 /* 766 * NOTE: in ISOC mode when a new frame starts and buf==NULL, 767 * we COULD already prepare a buffer here to avoid skipping the 768 * first frame. 769 */ 770 } 771 772 /* Copy data */ 773 if (buf && data_len > 0) 774 em28xx_copy_video(dev, buf, data_pkt, data_len); 775 776 /* Finish frame (ISOC only) => avoids lag of 1 frame */ 777 if (!dev->analog_xfer_bulk && frame_end) { 778 buf = finish_field_prepare_next(dev, buf, dmaq); 779 dev->usb_ctl.vid_buf = buf; 780 } 781 782 /* 783 * NOTES: 784 * 785 * 1) Tested with USB bulk transfers only ! 786 * The wording in the datasheet suggests that isoc might work different. 787 * The current code assumes that with isoc transfers each packet has a 788 * header like with the other em28xx devices. 789 * 790 * 2) Support for interlaced mode is pure theory. It has not been 791 * tested and it is unknown if these devices actually support it. 792 */ 793 } 794 795 /* Processes and copies the URB data content (video and VBI data) */ 796 static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb) 797 { 798 int xfer_bulk, num_packets, i; 799 unsigned char *usb_data_pkt; 800 unsigned int usb_data_len; 801 802 if (!dev) 803 return 0; 804 805 if (dev->disconnected) 806 return 0; 807 808 if (urb->status < 0) 809 print_err_status(dev, -1, urb->status); 810 811 xfer_bulk = usb_pipebulk(urb->pipe); 812 813 if (xfer_bulk) /* bulk */ 814 num_packets = 1; 815 else /* isoc */ 816 num_packets = urb->number_of_packets; 817 818 for (i = 0; i < num_packets; i++) { 819 if (xfer_bulk) { /* bulk */ 820 usb_data_len = urb->actual_length; 821 822 usb_data_pkt = urb->transfer_buffer; 823 } else { /* isoc */ 824 if (urb->iso_frame_desc[i].status < 0) { 825 print_err_status(dev, i, 826 urb->iso_frame_desc[i].status); 827 if (urb->iso_frame_desc[i].status != -EPROTO) 828 continue; 829 } 830 831 usb_data_len = urb->iso_frame_desc[i].actual_length; 832 if (usb_data_len > dev->max_pkt_size) { 833 em28xx_isocdbg("packet bigger than packet size"); 834 continue; 835 } 836 837 usb_data_pkt = urb->transfer_buffer + 838 urb->iso_frame_desc[i].offset; 839 } 840 841 if (usb_data_len == 0) { 842 /* NOTE: happens very often with isoc transfers */ 843 /* em28xx_usbdbg("packet %d is empty",i); - spammy */ 844 continue; 845 } 846 847 if (dev->is_em25xx) 848 process_frame_data_em25xx(dev, 849 usb_data_pkt, usb_data_len); 850 else 851 process_frame_data_em28xx(dev, 852 usb_data_pkt, usb_data_len); 853 } 854 return 1; 855 } 856 857 static int get_resource(enum v4l2_buf_type f_type) 858 { 859 switch (f_type) { 860 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 861 return EM28XX_RESOURCE_VIDEO; 862 case V4L2_BUF_TYPE_VBI_CAPTURE: 863 return EM28XX_RESOURCE_VBI; 864 default: 865 WARN_ON(1); 866 return -1; /* Indicate that device is busy */ 867 } 868 } 869 870 /* Usage lock check functions */ 871 static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type) 872 { 873 int res_type = get_resource(f_type); 874 875 /* is it free? */ 876 if (dev->resources & res_type) { 877 /* no, someone else uses it */ 878 return -EBUSY; 879 } 880 881 /* it's free, grab it */ 882 dev->resources |= res_type; 883 em28xx_videodbg("res: get %d\n", res_type); 884 return 0; 885 } 886 887 static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type) 888 { 889 int res_type = get_resource(f_type); 890 891 dev->resources &= ~res_type; 892 em28xx_videodbg("res: put %d\n", res_type); 893 } 894 895 static void em28xx_v4l2_media_release(struct em28xx *dev) 896 { 897 #ifdef CONFIG_MEDIA_CONTROLLER 898 int i; 899 900 for (i = 0; i < MAX_EM28XX_INPUT; i++) { 901 if (!INPUT(i)->type) 902 return; 903 media_device_unregister_entity(&dev->input_ent[i]); 904 } 905 #endif 906 } 907 908 /* 909 * Media Controller helper functions 910 */ 911 912 static int em28xx_enable_analog_tuner(struct em28xx *dev) 913 { 914 #ifdef CONFIG_MEDIA_CONTROLLER 915 struct media_device *mdev = dev->media_dev; 916 struct em28xx_v4l2 *v4l2 = dev->v4l2; 917 struct media_entity *source; 918 struct media_link *link, *found_link = NULL; 919 int ret, active_links = 0; 920 921 if (!mdev || !v4l2->decoder) 922 return 0; 923 924 /* 925 * This will find the tuner that is connected into the decoder. 926 * Technically, this is not 100% correct, as the device may be 927 * using an analog input instead of the tuner. However, as we can't 928 * do DVB streaming while the DMA engine is being used for V4L2, 929 * this should be enough for the actual needs. 930 */ 931 list_for_each_entry(link, &v4l2->decoder->links, list) { 932 if (link->sink->entity == v4l2->decoder) { 933 found_link = link; 934 if (link->flags & MEDIA_LNK_FL_ENABLED) 935 active_links++; 936 break; 937 } 938 } 939 940 if (active_links == 1 || !found_link) 941 return 0; 942 943 source = found_link->source->entity; 944 list_for_each_entry(link, &source->links, list) { 945 struct media_entity *sink; 946 int flags = 0; 947 948 sink = link->sink->entity; 949 950 if (sink == v4l2->decoder) 951 flags = MEDIA_LNK_FL_ENABLED; 952 953 ret = media_entity_setup_link(link, flags); 954 if (ret) { 955 dev_err(&dev->intf->dev, 956 "Couldn't change link %s->%s to %s. Error %d\n", 957 source->name, sink->name, 958 flags ? "enabled" : "disabled", 959 ret); 960 return ret; 961 } 962 963 em28xx_videodbg("link %s->%s was %s\n", 964 source->name, sink->name, 965 flags ? "ENABLED" : "disabled"); 966 } 967 #endif 968 return 0; 969 } 970 971 static const char * const iname[] = { 972 [EM28XX_VMUX_COMPOSITE] = "Composite", 973 [EM28XX_VMUX_SVIDEO] = "S-Video", 974 [EM28XX_VMUX_TELEVISION] = "Television", 975 [EM28XX_RADIO] = "Radio", 976 }; 977 978 static void em28xx_v4l2_create_entities(struct em28xx *dev) 979 { 980 #if defined(CONFIG_MEDIA_CONTROLLER) 981 struct em28xx_v4l2 *v4l2 = dev->v4l2; 982 int ret, i; 983 984 /* Initialize Video, VBI and Radio pads */ 985 v4l2->video_pad.flags = MEDIA_PAD_FL_SINK; 986 ret = media_entity_pads_init(&v4l2->vdev.entity, 1, &v4l2->video_pad); 987 if (ret < 0) 988 dev_err(&dev->intf->dev, 989 "failed to initialize video media entity!\n"); 990 991 if (em28xx_vbi_supported(dev)) { 992 v4l2->vbi_pad.flags = MEDIA_PAD_FL_SINK; 993 ret = media_entity_pads_init(&v4l2->vbi_dev.entity, 1, 994 &v4l2->vbi_pad); 995 if (ret < 0) 996 dev_err(&dev->intf->dev, 997 "failed to initialize vbi media entity!\n"); 998 } 999 1000 /* Webcams don't have input connectors */ 1001 if (dev->is_webcam) 1002 return; 1003 1004 /* Create entities for each input connector */ 1005 for (i = 0; i < MAX_EM28XX_INPUT; i++) { 1006 struct media_entity *ent = &dev->input_ent[i]; 1007 1008 if (!INPUT(i)->type) 1009 break; 1010 1011 ent->name = iname[INPUT(i)->type]; 1012 ent->flags = MEDIA_ENT_FL_CONNECTOR; 1013 dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE; 1014 1015 switch (INPUT(i)->type) { 1016 case EM28XX_VMUX_COMPOSITE: 1017 ent->function = MEDIA_ENT_F_CONN_COMPOSITE; 1018 break; 1019 case EM28XX_VMUX_SVIDEO: 1020 ent->function = MEDIA_ENT_F_CONN_SVIDEO; 1021 break; 1022 default: /* EM28XX_VMUX_TELEVISION or EM28XX_RADIO */ 1023 if (dev->tuner_type != TUNER_ABSENT) 1024 ent->function = MEDIA_ENT_F_CONN_RF; 1025 break; 1026 } 1027 1028 ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]); 1029 if (ret < 0) 1030 dev_err(&dev->intf->dev, 1031 "failed to initialize input pad[%d]!\n", i); 1032 1033 ret = media_device_register_entity(dev->media_dev, ent); 1034 if (ret < 0) 1035 dev_err(&dev->intf->dev, 1036 "failed to register input entity %d!\n", i); 1037 } 1038 #endif 1039 } 1040 1041 /* 1042 * Videobuf2 operations 1043 */ 1044 1045 static int queue_setup(struct vb2_queue *vq, 1046 unsigned int *nbuffers, unsigned int *nplanes, 1047 unsigned int sizes[], struct device *alloc_devs[]) 1048 { 1049 struct em28xx *dev = vb2_get_drv_priv(vq); 1050 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1051 unsigned long size = 1052 (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3; 1053 1054 if (*nplanes) 1055 return sizes[0] < size ? -EINVAL : 0; 1056 *nplanes = 1; 1057 sizes[0] = size; 1058 1059 em28xx_enable_analog_tuner(dev); 1060 1061 return 0; 1062 } 1063 1064 static int 1065 buffer_prepare(struct vb2_buffer *vb) 1066 { 1067 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 1068 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue); 1069 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1070 unsigned long size; 1071 1072 em28xx_videodbg("%s, field=%d\n", __func__, vbuf->field); 1073 1074 size = (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3; 1075 1076 if (vb2_plane_size(vb, 0) < size) { 1077 em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n", 1078 __func__, vb2_plane_size(vb, 0), size); 1079 return -EINVAL; 1080 } 1081 vb2_set_plane_payload(vb, 0, size); 1082 1083 return 0; 1084 } 1085 1086 int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count) 1087 { 1088 struct em28xx *dev = vb2_get_drv_priv(vq); 1089 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1090 struct v4l2_frequency f; 1091 struct v4l2_fh *owner; 1092 int rc = 0; 1093 1094 em28xx_videodbg("%s\n", __func__); 1095 1096 /* 1097 * Make sure streaming is not already in progress for this type 1098 * of filehandle (e.g. video, vbi) 1099 */ 1100 rc = res_get(dev, vq->type); 1101 if (rc) 1102 return rc; 1103 1104 if (v4l2->streaming_users == 0) { 1105 /* First active streaming user, so allocate all the URBs */ 1106 1107 /* Allocate the USB bandwidth */ 1108 em28xx_set_alternate(dev); 1109 1110 /* 1111 * Needed, since GPIO might have disabled power of 1112 * some i2c device 1113 */ 1114 em28xx_wake_i2c(dev); 1115 1116 v4l2->capture_type = -1; 1117 rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE, 1118 dev->analog_xfer_bulk, 1119 EM28XX_NUM_BUFS, 1120 dev->max_pkt_size, 1121 dev->packet_multiplier, 1122 em28xx_urb_data_copy); 1123 if (rc < 0) 1124 return rc; 1125 1126 /* 1127 * djh: it's not clear whether this code is still needed. I'm 1128 * leaving it in here for now entirely out of concern for 1129 * backward compatibility (the old code did it) 1130 */ 1131 1132 /* Ask tuner to go to analog or radio mode */ 1133 memset(&f, 0, sizeof(f)); 1134 f.frequency = v4l2->frequency; 1135 owner = (struct v4l2_fh *)vq->owner; 1136 if (owner && owner->vdev->vfl_type == VFL_TYPE_RADIO) 1137 f.type = V4L2_TUNER_RADIO; 1138 else 1139 f.type = V4L2_TUNER_ANALOG_TV; 1140 v4l2_device_call_all(&v4l2->v4l2_dev, 1141 0, tuner, s_frequency, &f); 1142 1143 /* Enable video stream at TV decoder */ 1144 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 1); 1145 } 1146 1147 v4l2->streaming_users++; 1148 1149 return rc; 1150 } 1151 1152 static void em28xx_stop_streaming(struct vb2_queue *vq) 1153 { 1154 struct em28xx *dev = vb2_get_drv_priv(vq); 1155 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1156 struct em28xx_dmaqueue *vidq = &dev->vidq; 1157 unsigned long flags = 0; 1158 1159 em28xx_videodbg("%s\n", __func__); 1160 1161 res_free(dev, vq->type); 1162 1163 if (v4l2->streaming_users-- == 1) { 1164 /* Disable video stream at TV decoder */ 1165 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0); 1166 1167 /* Last active user, so shutdown all the URBS */ 1168 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); 1169 } 1170 1171 spin_lock_irqsave(&dev->slock, flags); 1172 if (dev->usb_ctl.vid_buf) { 1173 vb2_buffer_done(&dev->usb_ctl.vid_buf->vb.vb2_buf, 1174 VB2_BUF_STATE_ERROR); 1175 dev->usb_ctl.vid_buf = NULL; 1176 } 1177 while (!list_empty(&vidq->active)) { 1178 struct em28xx_buffer *buf; 1179 1180 buf = list_entry(vidq->active.next, struct em28xx_buffer, list); 1181 list_del(&buf->list); 1182 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 1183 } 1184 spin_unlock_irqrestore(&dev->slock, flags); 1185 } 1186 1187 void em28xx_stop_vbi_streaming(struct vb2_queue *vq) 1188 { 1189 struct em28xx *dev = vb2_get_drv_priv(vq); 1190 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1191 struct em28xx_dmaqueue *vbiq = &dev->vbiq; 1192 unsigned long flags = 0; 1193 1194 em28xx_videodbg("%s\n", __func__); 1195 1196 res_free(dev, vq->type); 1197 1198 if (v4l2->streaming_users-- == 1) { 1199 /* Disable video stream at TV decoder */ 1200 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0); 1201 1202 /* Last active user, so shutdown all the URBS */ 1203 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); 1204 } 1205 1206 spin_lock_irqsave(&dev->slock, flags); 1207 if (dev->usb_ctl.vbi_buf) { 1208 vb2_buffer_done(&dev->usb_ctl.vbi_buf->vb.vb2_buf, 1209 VB2_BUF_STATE_ERROR); 1210 dev->usb_ctl.vbi_buf = NULL; 1211 } 1212 while (!list_empty(&vbiq->active)) { 1213 struct em28xx_buffer *buf; 1214 1215 buf = list_entry(vbiq->active.next, struct em28xx_buffer, list); 1216 list_del(&buf->list); 1217 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); 1218 } 1219 spin_unlock_irqrestore(&dev->slock, flags); 1220 } 1221 1222 static void 1223 buffer_queue(struct vb2_buffer *vb) 1224 { 1225 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 1226 struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue); 1227 struct em28xx_buffer *buf = 1228 container_of(vbuf, struct em28xx_buffer, vb); 1229 struct em28xx_dmaqueue *vidq = &dev->vidq; 1230 unsigned long flags = 0; 1231 1232 em28xx_videodbg("%s\n", __func__); 1233 buf->mem = vb2_plane_vaddr(vb, 0); 1234 buf->length = vb2_plane_size(vb, 0); 1235 1236 spin_lock_irqsave(&dev->slock, flags); 1237 list_add_tail(&buf->list, &vidq->active); 1238 spin_unlock_irqrestore(&dev->slock, flags); 1239 } 1240 1241 static const struct vb2_ops em28xx_video_qops = { 1242 .queue_setup = queue_setup, 1243 .buf_prepare = buffer_prepare, 1244 .buf_queue = buffer_queue, 1245 .start_streaming = em28xx_start_analog_streaming, 1246 .stop_streaming = em28xx_stop_streaming, 1247 .wait_prepare = vb2_ops_wait_prepare, 1248 .wait_finish = vb2_ops_wait_finish, 1249 }; 1250 1251 static int em28xx_vb2_setup(struct em28xx *dev) 1252 { 1253 int rc; 1254 struct vb2_queue *q; 1255 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1256 1257 /* Setup Videobuf2 for Video capture */ 1258 q = &v4l2->vb_vidq; 1259 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 1260 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF; 1261 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1262 q->drv_priv = dev; 1263 q->buf_struct_size = sizeof(struct em28xx_buffer); 1264 q->ops = &em28xx_video_qops; 1265 q->mem_ops = &vb2_vmalloc_memops; 1266 1267 rc = vb2_queue_init(q); 1268 if (rc < 0) 1269 return rc; 1270 1271 /* Setup Videobuf2 for VBI capture */ 1272 q = &v4l2->vb_vbiq; 1273 q->type = V4L2_BUF_TYPE_VBI_CAPTURE; 1274 q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR; 1275 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 1276 q->drv_priv = dev; 1277 q->buf_struct_size = sizeof(struct em28xx_buffer); 1278 q->ops = &em28xx_vbi_qops; 1279 q->mem_ops = &vb2_vmalloc_memops; 1280 1281 rc = vb2_queue_init(q); 1282 if (rc < 0) 1283 return rc; 1284 1285 return 0; 1286 } 1287 1288 /* 1289 * v4l2 interface 1290 */ 1291 1292 static void video_mux(struct em28xx *dev, int index) 1293 { 1294 struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev; 1295 1296 dev->ctl_input = index; 1297 dev->ctl_ainput = INPUT(index)->amux; 1298 dev->ctl_aoutput = INPUT(index)->aout; 1299 1300 if (!dev->ctl_aoutput) 1301 dev->ctl_aoutput = EM28XX_AOUT_MASTER; 1302 1303 v4l2_device_call_all(v4l2_dev, 0, video, s_routing, 1304 INPUT(index)->vmux, 0, 0); 1305 1306 if (dev->has_msp34xx) { 1307 if (dev->i2s_speed) { 1308 v4l2_device_call_all(v4l2_dev, 0, audio, 1309 s_i2s_clock_freq, dev->i2s_speed); 1310 } 1311 /* Note: this is msp3400 specific */ 1312 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing, 1313 dev->ctl_ainput, 1314 MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0); 1315 } 1316 1317 if (dev->board.adecoder != EM28XX_NOADECODER) { 1318 v4l2_device_call_all(v4l2_dev, 0, audio, s_routing, 1319 dev->ctl_ainput, dev->ctl_aoutput, 0); 1320 } 1321 1322 em28xx_audio_analog_set(dev); 1323 } 1324 1325 static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv) 1326 { 1327 struct em28xx *dev = priv; 1328 1329 /* 1330 * In the case of non-AC97 volume controls, we still need 1331 * to do some setups at em28xx, in order to mute/unmute 1332 * and to adjust audio volume. However, the value ranges 1333 * should be checked by the corresponding V4L subdriver. 1334 */ 1335 switch (ctrl->id) { 1336 case V4L2_CID_AUDIO_MUTE: 1337 dev->mute = ctrl->val; 1338 em28xx_audio_analog_set(dev); 1339 break; 1340 case V4L2_CID_AUDIO_VOLUME: 1341 dev->volume = ctrl->val; 1342 em28xx_audio_analog_set(dev); 1343 break; 1344 } 1345 } 1346 1347 static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl) 1348 { 1349 struct em28xx_v4l2 *v4l2 = 1350 container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler); 1351 struct em28xx *dev = v4l2->dev; 1352 int ret = -EINVAL; 1353 1354 switch (ctrl->id) { 1355 case V4L2_CID_AUDIO_MUTE: 1356 dev->mute = ctrl->val; 1357 ret = em28xx_audio_analog_set(dev); 1358 break; 1359 case V4L2_CID_AUDIO_VOLUME: 1360 dev->volume = ctrl->val; 1361 ret = em28xx_audio_analog_set(dev); 1362 break; 1363 case V4L2_CID_CONTRAST: 1364 ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val); 1365 break; 1366 case V4L2_CID_BRIGHTNESS: 1367 ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val); 1368 break; 1369 case V4L2_CID_SATURATION: 1370 ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val); 1371 break; 1372 case V4L2_CID_BLUE_BALANCE: 1373 ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val); 1374 break; 1375 case V4L2_CID_RED_BALANCE: 1376 ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val); 1377 break; 1378 case V4L2_CID_SHARPNESS: 1379 ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val); 1380 break; 1381 } 1382 1383 return (ret < 0) ? ret : 0; 1384 } 1385 1386 static const struct v4l2_ctrl_ops em28xx_ctrl_ops = { 1387 .s_ctrl = em28xx_s_ctrl, 1388 }; 1389 1390 static void size_to_scale(struct em28xx *dev, 1391 unsigned int width, unsigned int height, 1392 unsigned int *hscale, unsigned int *vscale) 1393 { 1394 unsigned int maxw = norm_maxw(dev); 1395 unsigned int maxh = norm_maxh(dev); 1396 1397 *hscale = (((unsigned long)maxw) << 12) / width - 4096L; 1398 if (*hscale > EM28XX_HVSCALE_MAX) 1399 *hscale = EM28XX_HVSCALE_MAX; 1400 1401 *vscale = (((unsigned long)maxh) << 12) / height - 4096L; 1402 if (*vscale > EM28XX_HVSCALE_MAX) 1403 *vscale = EM28XX_HVSCALE_MAX; 1404 } 1405 1406 static void scale_to_size(struct em28xx *dev, 1407 unsigned int hscale, unsigned int vscale, 1408 unsigned int *width, unsigned int *height) 1409 { 1410 unsigned int maxw = norm_maxw(dev); 1411 unsigned int maxh = norm_maxh(dev); 1412 1413 *width = (((unsigned long)maxw) << 12) / (hscale + 4096L); 1414 *height = (((unsigned long)maxh) << 12) / (vscale + 4096L); 1415 1416 /* Don't let width or height to be zero */ 1417 if (*width < 1) 1418 *width = 1; 1419 if (*height < 1) 1420 *height = 1; 1421 } 1422 1423 /* 1424 * IOCTL vidioc handling 1425 */ 1426 1427 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, 1428 struct v4l2_format *f) 1429 { 1430 struct em28xx *dev = video_drvdata(file); 1431 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1432 1433 f->fmt.pix.width = v4l2->width; 1434 f->fmt.pix.height = v4l2->height; 1435 f->fmt.pix.pixelformat = v4l2->format->fourcc; 1436 f->fmt.pix.bytesperline = (v4l2->width * v4l2->format->depth + 7) >> 3; 1437 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * v4l2->height; 1438 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 1439 1440 /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */ 1441 if (v4l2->progressive) 1442 f->fmt.pix.field = V4L2_FIELD_NONE; 1443 else 1444 f->fmt.pix.field = v4l2->interlaced_fieldmode ? 1445 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; 1446 return 0; 1447 } 1448 1449 static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc) 1450 { 1451 unsigned int i; 1452 1453 for (i = 0; i < ARRAY_SIZE(format); i++) 1454 if (format[i].fourcc == fourcc) 1455 return &format[i]; 1456 1457 return NULL; 1458 } 1459 1460 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, 1461 struct v4l2_format *f) 1462 { 1463 struct em28xx *dev = video_drvdata(file); 1464 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1465 unsigned int width = f->fmt.pix.width; 1466 unsigned int height = f->fmt.pix.height; 1467 unsigned int maxw = norm_maxw(dev); 1468 unsigned int maxh = norm_maxh(dev); 1469 unsigned int hscale, vscale; 1470 struct em28xx_fmt *fmt; 1471 1472 fmt = format_by_fourcc(f->fmt.pix.pixelformat); 1473 if (!fmt) { 1474 fmt = &format[0]; 1475 em28xx_videodbg("Fourcc format (%08x) invalid. Using default (%08x).\n", 1476 f->fmt.pix.pixelformat, fmt->fourcc); 1477 } 1478 1479 if (dev->board.is_em2800) { 1480 /* the em2800 can only scale down to 50% */ 1481 height = height > (3 * maxh / 4) ? maxh : maxh / 2; 1482 width = width > (3 * maxw / 4) ? maxw : maxw / 2; 1483 /* 1484 * MaxPacketSize for em2800 is too small to capture at full 1485 * resolution use half of maxw as the scaler can only scale 1486 * to 50% 1487 */ 1488 if (width == maxw && height == maxh) 1489 width /= 2; 1490 } else { 1491 /* 1492 * width must even because of the YUYV format 1493 * height must be even because of interlacing 1494 */ 1495 v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, 1496 1, 0); 1497 } 1498 /* Avoid division by zero at size_to_scale */ 1499 if (width < 1) 1500 width = 1; 1501 if (height < 1) 1502 height = 1; 1503 1504 size_to_scale(dev, width, height, &hscale, &vscale); 1505 scale_to_size(dev, hscale, vscale, &width, &height); 1506 1507 f->fmt.pix.width = width; 1508 f->fmt.pix.height = height; 1509 f->fmt.pix.pixelformat = fmt->fourcc; 1510 f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3; 1511 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height; 1512 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; 1513 if (v4l2->progressive) 1514 f->fmt.pix.field = V4L2_FIELD_NONE; 1515 else 1516 f->fmt.pix.field = v4l2->interlaced_fieldmode ? 1517 V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; 1518 f->fmt.pix.priv = 0; 1519 1520 return 0; 1521 } 1522 1523 static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc, 1524 unsigned int width, unsigned int height) 1525 { 1526 struct em28xx_fmt *fmt; 1527 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1528 1529 fmt = format_by_fourcc(fourcc); 1530 if (!fmt) 1531 return -EINVAL; 1532 1533 v4l2->format = fmt; 1534 v4l2->width = width; 1535 v4l2->height = height; 1536 1537 /* set new image size */ 1538 size_to_scale(dev, v4l2->width, v4l2->height, 1539 &v4l2->hscale, &v4l2->vscale); 1540 1541 em28xx_resolution_set(dev); 1542 1543 return 0; 1544 } 1545 1546 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, 1547 struct v4l2_format *f) 1548 { 1549 struct em28xx *dev = video_drvdata(file); 1550 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1551 1552 if (vb2_is_busy(&v4l2->vb_vidq)) 1553 return -EBUSY; 1554 1555 vidioc_try_fmt_vid_cap(file, priv, f); 1556 1557 return em28xx_set_video_format(dev, f->fmt.pix.pixelformat, 1558 f->fmt.pix.width, f->fmt.pix.height); 1559 } 1560 1561 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm) 1562 { 1563 struct em28xx *dev = video_drvdata(file); 1564 1565 *norm = dev->v4l2->norm; 1566 1567 return 0; 1568 } 1569 1570 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm) 1571 { 1572 struct em28xx *dev = video_drvdata(file); 1573 1574 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm); 1575 1576 return 0; 1577 } 1578 1579 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm) 1580 { 1581 struct em28xx *dev = video_drvdata(file); 1582 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1583 struct v4l2_format f; 1584 1585 if (norm == v4l2->norm) 1586 return 0; 1587 1588 if (v4l2->streaming_users > 0) 1589 return -EBUSY; 1590 1591 v4l2->norm = norm; 1592 1593 /* Adjusts width/height, if needed */ 1594 f.fmt.pix.width = 720; 1595 f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576; 1596 vidioc_try_fmt_vid_cap(file, priv, &f); 1597 1598 /* set new image size */ 1599 v4l2->width = f.fmt.pix.width; 1600 v4l2->height = f.fmt.pix.height; 1601 size_to_scale(dev, v4l2->width, v4l2->height, 1602 &v4l2->hscale, &v4l2->vscale); 1603 1604 em28xx_resolution_set(dev); 1605 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm); 1606 1607 return 0; 1608 } 1609 1610 static int vidioc_g_parm(struct file *file, void *priv, 1611 struct v4l2_streamparm *p) 1612 { 1613 struct v4l2_subdev_frame_interval ival = { 0 }; 1614 struct em28xx *dev = video_drvdata(file); 1615 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1616 int rc = 0; 1617 1618 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1619 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1620 return -EINVAL; 1621 1622 p->parm.capture.readbuffers = EM28XX_MIN_BUF; 1623 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 1624 if (dev->is_webcam) { 1625 rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0, 1626 video, g_frame_interval, &ival); 1627 if (!rc) 1628 p->parm.capture.timeperframe = ival.interval; 1629 } else { 1630 v4l2_video_std_frame_period(v4l2->norm, 1631 &p->parm.capture.timeperframe); 1632 } 1633 1634 return rc; 1635 } 1636 1637 static int vidioc_s_parm(struct file *file, void *priv, 1638 struct v4l2_streamparm *p) 1639 { 1640 struct em28xx *dev = video_drvdata(file); 1641 struct v4l2_subdev_frame_interval ival = { 1642 0, 1643 p->parm.capture.timeperframe 1644 }; 1645 int rc = 0; 1646 1647 if (!dev->is_webcam) 1648 return -ENOTTY; 1649 1650 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1651 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1652 return -EINVAL; 1653 1654 memset(&p->parm, 0, sizeof(p->parm)); 1655 p->parm.capture.readbuffers = EM28XX_MIN_BUF; 1656 p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; 1657 rc = v4l2_device_call_until_err(&dev->v4l2->v4l2_dev, 0, 1658 video, s_frame_interval, &ival); 1659 if (!rc) 1660 p->parm.capture.timeperframe = ival.interval; 1661 return rc; 1662 } 1663 1664 static int vidioc_enum_input(struct file *file, void *priv, 1665 struct v4l2_input *i) 1666 { 1667 struct em28xx *dev = video_drvdata(file); 1668 unsigned int n; 1669 int j; 1670 1671 n = i->index; 1672 if (n >= MAX_EM28XX_INPUT) 1673 return -EINVAL; 1674 if (!INPUT(n)->type) 1675 return -EINVAL; 1676 1677 i->type = V4L2_INPUT_TYPE_CAMERA; 1678 1679 strscpy(i->name, iname[INPUT(n)->type], sizeof(i->name)); 1680 1681 if (INPUT(n)->type == EM28XX_VMUX_TELEVISION) 1682 i->type = V4L2_INPUT_TYPE_TUNER; 1683 1684 i->std = dev->v4l2->vdev.tvnorms; 1685 /* webcams do not have the STD API */ 1686 if (dev->is_webcam) 1687 i->capabilities = 0; 1688 1689 /* Dynamically generates an audioset bitmask */ 1690 i->audioset = 0; 1691 for (j = 0; j < MAX_EM28XX_INPUT; j++) 1692 if (dev->amux_map[j] != EM28XX_AMUX_UNUSED) 1693 i->audioset |= 1 << j; 1694 1695 return 0; 1696 } 1697 1698 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) 1699 { 1700 struct em28xx *dev = video_drvdata(file); 1701 1702 *i = dev->ctl_input; 1703 1704 return 0; 1705 } 1706 1707 static int vidioc_s_input(struct file *file, void *priv, unsigned int i) 1708 { 1709 struct em28xx *dev = video_drvdata(file); 1710 1711 if (i >= MAX_EM28XX_INPUT) 1712 return -EINVAL; 1713 if (!INPUT(i)->type) 1714 return -EINVAL; 1715 1716 video_mux(dev, i); 1717 return 0; 1718 } 1719 1720 static int em28xx_fill_audio_input(struct em28xx *dev, 1721 const char *s, 1722 struct v4l2_audio *a, 1723 unsigned int index) 1724 { 1725 unsigned int idx = dev->amux_map[index]; 1726 1727 /* 1728 * With msp3400, almost all mappings use the default (amux = 0). 1729 * The only one may use a different value is WinTV USB2, where it 1730 * can also be SCART1 input. 1731 * As it is very doubtful that we would see new boards with msp3400, 1732 * let's just reuse the existing switch. 1733 */ 1734 if (dev->has_msp34xx && idx != EM28XX_AMUX_UNUSED) 1735 idx = EM28XX_AMUX_LINE_IN; 1736 1737 switch (idx) { 1738 case EM28XX_AMUX_VIDEO: 1739 strscpy(a->name, "Television", sizeof(a->name)); 1740 break; 1741 case EM28XX_AMUX_LINE_IN: 1742 strscpy(a->name, "Line In", sizeof(a->name)); 1743 break; 1744 case EM28XX_AMUX_VIDEO2: 1745 strscpy(a->name, "Television alt", sizeof(a->name)); 1746 break; 1747 case EM28XX_AMUX_PHONE: 1748 strscpy(a->name, "Phone", sizeof(a->name)); 1749 break; 1750 case EM28XX_AMUX_MIC: 1751 strscpy(a->name, "Mic", sizeof(a->name)); 1752 break; 1753 case EM28XX_AMUX_CD: 1754 strscpy(a->name, "CD", sizeof(a->name)); 1755 break; 1756 case EM28XX_AMUX_AUX: 1757 strscpy(a->name, "Aux", sizeof(a->name)); 1758 break; 1759 case EM28XX_AMUX_PCM_OUT: 1760 strscpy(a->name, "PCM", sizeof(a->name)); 1761 break; 1762 case EM28XX_AMUX_UNUSED: 1763 default: 1764 return -EINVAL; 1765 } 1766 a->index = index; 1767 a->capability = V4L2_AUDCAP_STEREO; 1768 1769 em28xx_videodbg("%s: audio input index %d is '%s'\n", 1770 s, a->index, a->name); 1771 1772 return 0; 1773 } 1774 1775 static int vidioc_enumaudio(struct file *file, void *fh, struct v4l2_audio *a) 1776 { 1777 struct em28xx *dev = video_drvdata(file); 1778 1779 if (a->index >= MAX_EM28XX_INPUT) 1780 return -EINVAL; 1781 1782 return em28xx_fill_audio_input(dev, __func__, a, a->index); 1783 } 1784 1785 static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a) 1786 { 1787 struct em28xx *dev = video_drvdata(file); 1788 int i; 1789 1790 for (i = 0; i < MAX_EM28XX_INPUT; i++) 1791 if (dev->ctl_ainput == dev->amux_map[i]) 1792 return em28xx_fill_audio_input(dev, __func__, a, i); 1793 1794 /* Should never happen! */ 1795 return -EINVAL; 1796 } 1797 1798 static int vidioc_s_audio(struct file *file, void *priv, 1799 const struct v4l2_audio *a) 1800 { 1801 struct em28xx *dev = video_drvdata(file); 1802 int idx, i; 1803 1804 if (a->index >= MAX_EM28XX_INPUT) 1805 return -EINVAL; 1806 1807 idx = dev->amux_map[a->index]; 1808 1809 if (idx == EM28XX_AMUX_UNUSED) 1810 return -EINVAL; 1811 1812 dev->ctl_ainput = idx; 1813 1814 /* 1815 * FIXME: This is wrong, as different inputs at em28xx_cards 1816 * may have different audio outputs. So, the right thing 1817 * to do is to implement VIDIOC_G_AUDOUT/VIDIOC_S_AUDOUT. 1818 * With the current board definitions, this would work fine, 1819 * as, currently, all boards fit. 1820 */ 1821 for (i = 0; i < MAX_EM28XX_INPUT; i++) 1822 if (idx == dev->amux_map[i]) 1823 break; 1824 if (i == MAX_EM28XX_INPUT) 1825 return -EINVAL; 1826 1827 dev->ctl_aoutput = INPUT(i)->aout; 1828 1829 if (!dev->ctl_aoutput) 1830 dev->ctl_aoutput = EM28XX_AOUT_MASTER; 1831 1832 em28xx_videodbg("%s: set audio input to %d\n", __func__, 1833 dev->ctl_ainput); 1834 1835 return 0; 1836 } 1837 1838 static int vidioc_g_tuner(struct file *file, void *priv, 1839 struct v4l2_tuner *t) 1840 { 1841 struct em28xx *dev = video_drvdata(file); 1842 1843 if (t->index != 0) 1844 return -EINVAL; 1845 1846 strscpy(t->name, "Tuner", sizeof(t->name)); 1847 1848 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t); 1849 return 0; 1850 } 1851 1852 static int vidioc_s_tuner(struct file *file, void *priv, 1853 const struct v4l2_tuner *t) 1854 { 1855 struct em28xx *dev = video_drvdata(file); 1856 1857 if (t->index != 0) 1858 return -EINVAL; 1859 1860 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t); 1861 return 0; 1862 } 1863 1864 static int vidioc_g_frequency(struct file *file, void *priv, 1865 struct v4l2_frequency *f) 1866 { 1867 struct em28xx *dev = video_drvdata(file); 1868 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1869 1870 if (f->tuner != 0) 1871 return -EINVAL; 1872 1873 f->frequency = v4l2->frequency; 1874 return 0; 1875 } 1876 1877 static int vidioc_s_frequency(struct file *file, void *priv, 1878 const struct v4l2_frequency *f) 1879 { 1880 struct v4l2_frequency new_freq = *f; 1881 struct em28xx *dev = video_drvdata(file); 1882 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1883 1884 if (f->tuner != 0) 1885 return -EINVAL; 1886 1887 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f); 1888 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq); 1889 v4l2->frequency = new_freq.frequency; 1890 1891 return 0; 1892 } 1893 1894 #ifdef CONFIG_VIDEO_ADV_DEBUG 1895 static int vidioc_g_chip_info(struct file *file, void *priv, 1896 struct v4l2_dbg_chip_info *chip) 1897 { 1898 struct em28xx *dev = video_drvdata(file); 1899 1900 if (chip->match.addr > 1) 1901 return -EINVAL; 1902 if (chip->match.addr == 1) 1903 strscpy(chip->name, "ac97", sizeof(chip->name)); 1904 else 1905 strscpy(chip->name, 1906 dev->v4l2->v4l2_dev.name, sizeof(chip->name)); 1907 return 0; 1908 } 1909 1910 static int em28xx_reg_len(int reg) 1911 { 1912 switch (reg) { 1913 case EM28XX_R40_AC97LSB: 1914 case EM28XX_R30_HSCALELOW: 1915 case EM28XX_R32_VSCALELOW: 1916 return 2; 1917 default: 1918 return 1; 1919 } 1920 } 1921 1922 static int vidioc_g_register(struct file *file, void *priv, 1923 struct v4l2_dbg_register *reg) 1924 { 1925 struct em28xx *dev = video_drvdata(file); 1926 int ret; 1927 1928 if (reg->match.addr > 1) 1929 return -EINVAL; 1930 if (reg->match.addr) { 1931 ret = em28xx_read_ac97(dev, reg->reg); 1932 if (ret < 0) 1933 return ret; 1934 1935 reg->val = ret; 1936 reg->size = 1; 1937 return 0; 1938 } 1939 1940 /* Match host */ 1941 reg->size = em28xx_reg_len(reg->reg); 1942 if (reg->size == 1) { 1943 ret = em28xx_read_reg(dev, reg->reg); 1944 1945 if (ret < 0) 1946 return ret; 1947 1948 reg->val = ret; 1949 } else { 1950 __le16 val = 0; 1951 1952 ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS, 1953 reg->reg, (char *)&val, 2); 1954 if (ret < 0) 1955 return ret; 1956 1957 reg->val = le16_to_cpu(val); 1958 } 1959 1960 return 0; 1961 } 1962 1963 static int vidioc_s_register(struct file *file, void *priv, 1964 const struct v4l2_dbg_register *reg) 1965 { 1966 struct em28xx *dev = video_drvdata(file); 1967 __le16 buf; 1968 1969 if (reg->match.addr > 1) 1970 return -EINVAL; 1971 if (reg->match.addr) 1972 return em28xx_write_ac97(dev, reg->reg, reg->val); 1973 1974 /* Match host */ 1975 buf = cpu_to_le16(reg->val); 1976 1977 return em28xx_write_regs(dev, reg->reg, (char *)&buf, 1978 em28xx_reg_len(reg->reg)); 1979 } 1980 #endif 1981 1982 static int vidioc_querycap(struct file *file, void *priv, 1983 struct v4l2_capability *cap) 1984 { 1985 struct video_device *vdev = video_devdata(file); 1986 struct em28xx *dev = video_drvdata(file); 1987 struct em28xx_v4l2 *v4l2 = dev->v4l2; 1988 struct usb_device *udev = interface_to_usbdev(dev->intf); 1989 1990 strscpy(cap->driver, "em28xx", sizeof(cap->driver)); 1991 strscpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card)); 1992 usb_make_path(udev, cap->bus_info, sizeof(cap->bus_info)); 1993 1994 if (vdev->vfl_type == VFL_TYPE_GRABBER) 1995 cap->device_caps = V4L2_CAP_READWRITE | 1996 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 1997 else if (vdev->vfl_type == VFL_TYPE_RADIO) 1998 cap->device_caps = V4L2_CAP_RADIO; 1999 else 2000 cap->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE; 2001 2002 if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE) 2003 cap->device_caps |= V4L2_CAP_AUDIO; 2004 2005 if (dev->tuner_type != TUNER_ABSENT) 2006 cap->device_caps |= V4L2_CAP_TUNER; 2007 2008 cap->capabilities = cap->device_caps | 2009 V4L2_CAP_DEVICE_CAPS | V4L2_CAP_READWRITE | 2010 V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; 2011 if (video_is_registered(&v4l2->vbi_dev)) 2012 cap->capabilities |= V4L2_CAP_VBI_CAPTURE; 2013 if (video_is_registered(&v4l2->radio_dev)) 2014 cap->capabilities |= V4L2_CAP_RADIO; 2015 return 0; 2016 } 2017 2018 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, 2019 struct v4l2_fmtdesc *f) 2020 { 2021 if (unlikely(f->index >= ARRAY_SIZE(format))) 2022 return -EINVAL; 2023 2024 strscpy(f->description, format[f->index].name, sizeof(f->description)); 2025 f->pixelformat = format[f->index].fourcc; 2026 2027 return 0; 2028 } 2029 2030 static int vidioc_enum_framesizes(struct file *file, void *priv, 2031 struct v4l2_frmsizeenum *fsize) 2032 { 2033 struct em28xx *dev = video_drvdata(file); 2034 struct em28xx_fmt *fmt; 2035 unsigned int maxw = norm_maxw(dev); 2036 unsigned int maxh = norm_maxh(dev); 2037 2038 fmt = format_by_fourcc(fsize->pixel_format); 2039 if (!fmt) { 2040 em28xx_videodbg("Fourcc format (%08x) invalid.\n", 2041 fsize->pixel_format); 2042 return -EINVAL; 2043 } 2044 2045 if (dev->board.is_em2800) { 2046 if (fsize->index > 1) 2047 return -EINVAL; 2048 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; 2049 fsize->discrete.width = maxw / (1 + fsize->index); 2050 fsize->discrete.height = maxh / (1 + fsize->index); 2051 return 0; 2052 } 2053 2054 if (fsize->index != 0) 2055 return -EINVAL; 2056 2057 /* Report a continuous range */ 2058 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; 2059 scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX, 2060 &fsize->stepwise.min_width, &fsize->stepwise.min_height); 2061 if (fsize->stepwise.min_width < 48) 2062 fsize->stepwise.min_width = 48; 2063 if (fsize->stepwise.min_height < 38) 2064 fsize->stepwise.min_height = 38; 2065 fsize->stepwise.max_width = maxw; 2066 fsize->stepwise.max_height = maxh; 2067 fsize->stepwise.step_width = 1; 2068 fsize->stepwise.step_height = 1; 2069 return 0; 2070 } 2071 2072 /* RAW VBI ioctls */ 2073 2074 static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv, 2075 struct v4l2_format *format) 2076 { 2077 struct em28xx *dev = video_drvdata(file); 2078 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2079 2080 format->fmt.vbi.samples_per_line = v4l2->vbi_width; 2081 format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY; 2082 format->fmt.vbi.offset = 0; 2083 format->fmt.vbi.flags = 0; 2084 format->fmt.vbi.sampling_rate = 6750000 * 4 / 2; 2085 format->fmt.vbi.count[0] = v4l2->vbi_height; 2086 format->fmt.vbi.count[1] = v4l2->vbi_height; 2087 memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved)); 2088 2089 /* Varies by video standard (NTSC, PAL, etc.) */ 2090 if (v4l2->norm & V4L2_STD_525_60) { 2091 /* NTSC */ 2092 format->fmt.vbi.start[0] = 10; 2093 format->fmt.vbi.start[1] = 273; 2094 } else if (v4l2->norm & V4L2_STD_625_50) { 2095 /* PAL */ 2096 format->fmt.vbi.start[0] = 6; 2097 format->fmt.vbi.start[1] = 318; 2098 } 2099 2100 return 0; 2101 } 2102 2103 /* 2104 * RADIO ESPECIFIC IOCTLS 2105 */ 2106 2107 static int radio_g_tuner(struct file *file, void *priv, 2108 struct v4l2_tuner *t) 2109 { 2110 struct em28xx *dev = video_drvdata(file); 2111 2112 if (unlikely(t->index > 0)) 2113 return -EINVAL; 2114 2115 strscpy(t->name, "Radio", sizeof(t->name)); 2116 2117 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t); 2118 2119 return 0; 2120 } 2121 2122 static int radio_s_tuner(struct file *file, void *priv, 2123 const struct v4l2_tuner *t) 2124 { 2125 struct em28xx *dev = video_drvdata(file); 2126 2127 if (t->index != 0) 2128 return -EINVAL; 2129 2130 v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t); 2131 2132 return 0; 2133 } 2134 2135 /* 2136 * em28xx_free_v4l2() - Free struct em28xx_v4l2 2137 * 2138 * @ref: struct kref for struct em28xx_v4l2 2139 * 2140 * Called when all users of struct em28xx_v4l2 are gone 2141 */ 2142 static void em28xx_free_v4l2(struct kref *ref) 2143 { 2144 struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref); 2145 2146 v4l2->dev->v4l2 = NULL; 2147 kfree(v4l2); 2148 } 2149 2150 /* 2151 * em28xx_v4l2_open() 2152 * inits the device and starts isoc transfer 2153 */ 2154 static int em28xx_v4l2_open(struct file *filp) 2155 { 2156 struct video_device *vdev = video_devdata(filp); 2157 struct em28xx *dev = video_drvdata(filp); 2158 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2159 enum v4l2_buf_type fh_type = 0; 2160 int ret; 2161 2162 switch (vdev->vfl_type) { 2163 case VFL_TYPE_GRABBER: 2164 fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2165 break; 2166 case VFL_TYPE_VBI: 2167 fh_type = V4L2_BUF_TYPE_VBI_CAPTURE; 2168 break; 2169 case VFL_TYPE_RADIO: 2170 break; 2171 default: 2172 return -EINVAL; 2173 } 2174 2175 em28xx_videodbg("open dev=%s type=%s users=%d\n", 2176 video_device_node_name(vdev), v4l2_type_names[fh_type], 2177 v4l2->users); 2178 2179 if (mutex_lock_interruptible(&dev->lock)) 2180 return -ERESTARTSYS; 2181 2182 ret = v4l2_fh_open(filp); 2183 if (ret) { 2184 dev_err(&dev->intf->dev, 2185 "%s: v4l2_fh_open() returned error %d\n", 2186 __func__, ret); 2187 mutex_unlock(&dev->lock); 2188 return ret; 2189 } 2190 2191 if (v4l2->users == 0) { 2192 em28xx_set_mode(dev, EM28XX_ANALOG_MODE); 2193 2194 if (vdev->vfl_type != VFL_TYPE_RADIO) 2195 em28xx_resolution_set(dev); 2196 2197 /* 2198 * Needed, since GPIO might have disabled power 2199 * of some i2c devices 2200 */ 2201 em28xx_wake_i2c(dev); 2202 } 2203 2204 if (vdev->vfl_type == VFL_TYPE_RADIO) { 2205 em28xx_videodbg("video_open: setting radio device\n"); 2206 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio); 2207 } 2208 2209 kref_get(&dev->ref); 2210 kref_get(&v4l2->ref); 2211 v4l2->users++; 2212 2213 mutex_unlock(&dev->lock); 2214 2215 return 0; 2216 } 2217 2218 /* 2219 * em28xx_v4l2_fini() 2220 * unregisters the v4l2,i2c and usb devices 2221 * called when the device gets disconected or at module unload 2222 */ 2223 static int em28xx_v4l2_fini(struct em28xx *dev) 2224 { 2225 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2226 2227 if (dev->is_audio_only) { 2228 /* Shouldn't initialize IR for this interface */ 2229 return 0; 2230 } 2231 2232 if (!dev->has_video) { 2233 /* This device does not support the v4l2 extension */ 2234 return 0; 2235 } 2236 2237 if (!v4l2) 2238 return 0; 2239 2240 dev_info(&dev->intf->dev, "Closing video extension\n"); 2241 2242 mutex_lock(&dev->lock); 2243 2244 v4l2_device_disconnect(&v4l2->v4l2_dev); 2245 2246 em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE); 2247 2248 em28xx_v4l2_media_release(dev); 2249 2250 if (video_is_registered(&v4l2->radio_dev)) { 2251 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", 2252 video_device_node_name(&v4l2->radio_dev)); 2253 video_unregister_device(&v4l2->radio_dev); 2254 } 2255 if (video_is_registered(&v4l2->vbi_dev)) { 2256 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", 2257 video_device_node_name(&v4l2->vbi_dev)); 2258 video_unregister_device(&v4l2->vbi_dev); 2259 } 2260 if (video_is_registered(&v4l2->vdev)) { 2261 dev_info(&dev->intf->dev, "V4L2 device %s deregistered\n", 2262 video_device_node_name(&v4l2->vdev)); 2263 video_unregister_device(&v4l2->vdev); 2264 } 2265 2266 v4l2_ctrl_handler_free(&v4l2->ctrl_handler); 2267 v4l2_device_unregister(&v4l2->v4l2_dev); 2268 2269 kref_put(&v4l2->ref, em28xx_free_v4l2); 2270 2271 mutex_unlock(&dev->lock); 2272 2273 kref_put(&dev->ref, em28xx_free_device); 2274 2275 return 0; 2276 } 2277 2278 static int em28xx_v4l2_suspend(struct em28xx *dev) 2279 { 2280 if (dev->is_audio_only) 2281 return 0; 2282 2283 if (!dev->has_video) 2284 return 0; 2285 2286 dev_info(&dev->intf->dev, "Suspending video extension\n"); 2287 em28xx_stop_urbs(dev); 2288 return 0; 2289 } 2290 2291 static int em28xx_v4l2_resume(struct em28xx *dev) 2292 { 2293 if (dev->is_audio_only) 2294 return 0; 2295 2296 if (!dev->has_video) 2297 return 0; 2298 2299 dev_info(&dev->intf->dev, "Resuming video extension\n"); 2300 /* what do we do here */ 2301 return 0; 2302 } 2303 2304 /* 2305 * em28xx_v4l2_close() 2306 * stops streaming and deallocates all resources allocated by the v4l2 2307 * calls and ioctls 2308 */ 2309 static int em28xx_v4l2_close(struct file *filp) 2310 { 2311 struct em28xx *dev = video_drvdata(filp); 2312 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2313 struct usb_device *udev = interface_to_usbdev(dev->intf); 2314 int err; 2315 2316 em28xx_videodbg("users=%d\n", v4l2->users); 2317 2318 vb2_fop_release(filp); 2319 mutex_lock(&dev->lock); 2320 2321 if (v4l2->users == 1) { 2322 /* No sense to try to write to the device */ 2323 if (dev->disconnected) 2324 goto exit; 2325 2326 /* Save some power by putting tuner to sleep */ 2327 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby); 2328 2329 /* do this before setting alternate! */ 2330 em28xx_set_mode(dev, EM28XX_SUSPEND); 2331 2332 /* set alternate 0 */ 2333 dev->alt = 0; 2334 em28xx_videodbg("setting alternate 0\n"); 2335 err = usb_set_interface(udev, 0, 0); 2336 if (err < 0) { 2337 dev_err(&dev->intf->dev, 2338 "cannot change alternate number to 0 (error=%i)\n", 2339 err); 2340 } 2341 } 2342 2343 exit: 2344 v4l2->users--; 2345 kref_put(&v4l2->ref, em28xx_free_v4l2); 2346 mutex_unlock(&dev->lock); 2347 kref_put(&dev->ref, em28xx_free_device); 2348 2349 return 0; 2350 } 2351 2352 static const struct v4l2_file_operations em28xx_v4l_fops = { 2353 .owner = THIS_MODULE, 2354 .open = em28xx_v4l2_open, 2355 .release = em28xx_v4l2_close, 2356 .read = vb2_fop_read, 2357 .poll = vb2_fop_poll, 2358 .mmap = vb2_fop_mmap, 2359 .unlocked_ioctl = video_ioctl2, 2360 }; 2361 2362 static const struct v4l2_ioctl_ops video_ioctl_ops = { 2363 .vidioc_querycap = vidioc_querycap, 2364 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, 2365 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, 2366 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, 2367 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, 2368 .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2369 .vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2370 .vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, 2371 .vidioc_enum_framesizes = vidioc_enum_framesizes, 2372 .vidioc_enumaudio = vidioc_enumaudio, 2373 .vidioc_g_audio = vidioc_g_audio, 2374 .vidioc_s_audio = vidioc_s_audio, 2375 2376 .vidioc_reqbufs = vb2_ioctl_reqbufs, 2377 .vidioc_create_bufs = vb2_ioctl_create_bufs, 2378 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 2379 .vidioc_querybuf = vb2_ioctl_querybuf, 2380 .vidioc_qbuf = vb2_ioctl_qbuf, 2381 .vidioc_dqbuf = vb2_ioctl_dqbuf, 2382 2383 .vidioc_g_std = vidioc_g_std, 2384 .vidioc_querystd = vidioc_querystd, 2385 .vidioc_s_std = vidioc_s_std, 2386 .vidioc_g_parm = vidioc_g_parm, 2387 .vidioc_s_parm = vidioc_s_parm, 2388 .vidioc_enum_input = vidioc_enum_input, 2389 .vidioc_g_input = vidioc_g_input, 2390 .vidioc_s_input = vidioc_s_input, 2391 .vidioc_streamon = vb2_ioctl_streamon, 2392 .vidioc_streamoff = vb2_ioctl_streamoff, 2393 .vidioc_g_tuner = vidioc_g_tuner, 2394 .vidioc_s_tuner = vidioc_s_tuner, 2395 .vidioc_g_frequency = vidioc_g_frequency, 2396 .vidioc_s_frequency = vidioc_s_frequency, 2397 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 2398 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 2399 #ifdef CONFIG_VIDEO_ADV_DEBUG 2400 .vidioc_g_chip_info = vidioc_g_chip_info, 2401 .vidioc_g_register = vidioc_g_register, 2402 .vidioc_s_register = vidioc_s_register, 2403 #endif 2404 }; 2405 2406 static const struct video_device em28xx_video_template = { 2407 .fops = &em28xx_v4l_fops, 2408 .ioctl_ops = &video_ioctl_ops, 2409 .release = video_device_release_empty, 2410 .tvnorms = V4L2_STD_ALL, 2411 }; 2412 2413 static const struct v4l2_file_operations radio_fops = { 2414 .owner = THIS_MODULE, 2415 .open = em28xx_v4l2_open, 2416 .release = em28xx_v4l2_close, 2417 .unlocked_ioctl = video_ioctl2, 2418 }; 2419 2420 static const struct v4l2_ioctl_ops radio_ioctl_ops = { 2421 .vidioc_querycap = vidioc_querycap, 2422 .vidioc_g_tuner = radio_g_tuner, 2423 .vidioc_s_tuner = radio_s_tuner, 2424 .vidioc_g_frequency = vidioc_g_frequency, 2425 .vidioc_s_frequency = vidioc_s_frequency, 2426 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, 2427 .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 2428 #ifdef CONFIG_VIDEO_ADV_DEBUG 2429 .vidioc_g_chip_info = vidioc_g_chip_info, 2430 .vidioc_g_register = vidioc_g_register, 2431 .vidioc_s_register = vidioc_s_register, 2432 #endif 2433 }; 2434 2435 static struct video_device em28xx_radio_template = { 2436 .fops = &radio_fops, 2437 .ioctl_ops = &radio_ioctl_ops, 2438 .release = video_device_release_empty, 2439 }; 2440 2441 /* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */ 2442 static unsigned short saa711x_addrs[] = { 2443 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */ 2444 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */ 2445 I2C_CLIENT_END }; 2446 2447 static unsigned short tvp5150_addrs[] = { 2448 0xb8 >> 1, 2449 0xba >> 1, 2450 I2C_CLIENT_END 2451 }; 2452 2453 static unsigned short msp3400_addrs[] = { 2454 0x80 >> 1, 2455 0x88 >> 1, 2456 I2C_CLIENT_END 2457 }; 2458 2459 /******************************** usb interface ******************************/ 2460 2461 static void em28xx_vdev_init(struct em28xx *dev, 2462 struct video_device *vfd, 2463 const struct video_device *template, 2464 const char *type_name) 2465 { 2466 *vfd = *template; 2467 vfd->v4l2_dev = &dev->v4l2->v4l2_dev; 2468 vfd->lock = &dev->lock; 2469 if (dev->is_webcam) 2470 vfd->tvnorms = 0; 2471 2472 snprintf(vfd->name, sizeof(vfd->name), "%s %s", 2473 dev_name(&dev->intf->dev), type_name); 2474 2475 video_set_drvdata(vfd, dev); 2476 } 2477 2478 static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr) 2479 { 2480 struct em28xx_v4l2 *v4l2 = dev->v4l2; 2481 struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev; 2482 struct tuner_setup tun_setup; 2483 struct v4l2_frequency f; 2484 2485 memset(&tun_setup, 0, sizeof(tun_setup)); 2486 2487 tun_setup.mode_mask = T_ANALOG_TV | T_RADIO; 2488 tun_setup.tuner_callback = em28xx_tuner_callback; 2489 2490 if (dev->board.radio.type) { 2491 tun_setup.type = dev->board.radio.type; 2492 tun_setup.addr = dev->board.radio_addr; 2493 2494 v4l2_device_call_all(v4l2_dev, 2495 0, tuner, s_type_addr, &tun_setup); 2496 } 2497 2498 if (dev->tuner_type != TUNER_ABSENT && dev->tuner_type) { 2499 tun_setup.type = dev->tuner_type; 2500 tun_setup.addr = tuner_addr; 2501 2502 v4l2_device_call_all(v4l2_dev, 2503 0, tuner, s_type_addr, &tun_setup); 2504 } 2505 2506 if (dev->board.tda9887_conf) { 2507 struct v4l2_priv_tun_config tda9887_cfg; 2508 2509 tda9887_cfg.tuner = TUNER_TDA9887; 2510 tda9887_cfg.priv = &dev->board.tda9887_conf; 2511 2512 v4l2_device_call_all(v4l2_dev, 2513 0, tuner, s_config, &tda9887_cfg); 2514 } 2515 2516 if (dev->tuner_type == TUNER_XC2028) { 2517 struct v4l2_priv_tun_config xc2028_cfg; 2518 struct xc2028_ctrl ctl; 2519 2520 memset(&xc2028_cfg, 0, sizeof(xc2028_cfg)); 2521 memset(&ctl, 0, sizeof(ctl)); 2522 2523 em28xx_setup_xc3028(dev, &ctl); 2524 2525 xc2028_cfg.tuner = TUNER_XC2028; 2526 xc2028_cfg.priv = &ctl; 2527 2528 v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg); 2529 } 2530 2531 /* configure tuner */ 2532 f.tuner = 0; 2533 f.type = V4L2_TUNER_ANALOG_TV; 2534 f.frequency = 9076; /* just a magic number */ 2535 v4l2->frequency = f.frequency; 2536 v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f); 2537 } 2538 2539 static int em28xx_v4l2_init(struct em28xx *dev) 2540 { 2541 u8 val; 2542 int ret; 2543 unsigned int maxw; 2544 struct v4l2_ctrl_handler *hdl; 2545 struct em28xx_v4l2 *v4l2; 2546 2547 if (dev->is_audio_only) { 2548 /* Shouldn't initialize IR for this interface */ 2549 return 0; 2550 } 2551 2552 if (!dev->has_video) { 2553 /* This device does not support the v4l2 extension */ 2554 return 0; 2555 } 2556 2557 dev_info(&dev->intf->dev, "Registering V4L2 extension\n"); 2558 2559 mutex_lock(&dev->lock); 2560 2561 v4l2 = kzalloc(sizeof(*v4l2), GFP_KERNEL); 2562 if (!v4l2) { 2563 mutex_unlock(&dev->lock); 2564 return -ENOMEM; 2565 } 2566 kref_init(&v4l2->ref); 2567 v4l2->dev = dev; 2568 dev->v4l2 = v4l2; 2569 2570 #ifdef CONFIG_MEDIA_CONTROLLER 2571 v4l2->v4l2_dev.mdev = dev->media_dev; 2572 #endif 2573 ret = v4l2_device_register(&dev->intf->dev, &v4l2->v4l2_dev); 2574 if (ret < 0) { 2575 dev_err(&dev->intf->dev, 2576 "Call to v4l2_device_register() failed!\n"); 2577 goto err; 2578 } 2579 2580 hdl = &v4l2->ctrl_handler; 2581 v4l2_ctrl_handler_init(hdl, 8); 2582 v4l2->v4l2_dev.ctrl_handler = hdl; 2583 2584 if (dev->is_webcam) 2585 v4l2->progressive = true; 2586 2587 /* 2588 * Default format, used for tvp5150 or saa711x output formats 2589 */ 2590 v4l2->vinmode = EM28XX_VINMODE_YUV422_CbYCrY; 2591 v4l2->vinctl = EM28XX_VINCTRL_INTERLACED | 2592 EM28XX_VINCTRL_CCIR656_ENABLE; 2593 2594 /* request some modules */ 2595 2596 if (dev->has_msp34xx) 2597 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2598 &dev->i2c_adap[dev->def_i2c_bus], 2599 "msp3400", 0, msp3400_addrs); 2600 2601 if (dev->board.decoder == EM28XX_SAA711X) 2602 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2603 &dev->i2c_adap[dev->def_i2c_bus], 2604 "saa7115_auto", 0, saa711x_addrs); 2605 2606 if (dev->board.decoder == EM28XX_TVP5150) 2607 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2608 &dev->i2c_adap[dev->def_i2c_bus], 2609 "tvp5150", 0, tvp5150_addrs); 2610 2611 if (dev->board.adecoder == EM28XX_TVAUDIO) 2612 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2613 &dev->i2c_adap[dev->def_i2c_bus], 2614 "tvaudio", dev->board.tvaudio_addr, NULL); 2615 2616 /* Initialize tuner and camera */ 2617 2618 if (dev->board.tuner_type != TUNER_ABSENT) { 2619 unsigned short tuner_addr = dev->board.tuner_addr; 2620 int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT); 2621 2622 if (dev->board.radio.type) 2623 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2624 &dev->i2c_adap[dev->def_i2c_bus], 2625 "tuner", dev->board.radio_addr, 2626 NULL); 2627 2628 if (has_demod) 2629 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2630 &dev->i2c_adap[dev->def_i2c_bus], 2631 "tuner", 0, 2632 v4l2_i2c_tuner_addrs(ADDRS_DEMOD)); 2633 if (tuner_addr == 0) { 2634 enum v4l2_i2c_tuner_type type = 2635 has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV; 2636 struct v4l2_subdev *sd; 2637 2638 sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2639 &dev->i2c_adap[dev->def_i2c_bus], 2640 "tuner", 0, 2641 v4l2_i2c_tuner_addrs(type)); 2642 2643 if (sd) 2644 tuner_addr = v4l2_i2c_subdev_addr(sd); 2645 } else { 2646 v4l2_i2c_new_subdev(&v4l2->v4l2_dev, 2647 &dev->i2c_adap[dev->def_i2c_bus], 2648 "tuner", tuner_addr, NULL); 2649 } 2650 2651 em28xx_tuner_setup(dev, tuner_addr); 2652 } 2653 2654 if (dev->em28xx_sensor != EM28XX_NOSENSOR) 2655 em28xx_init_camera(dev); 2656 2657 /* Configure audio */ 2658 ret = em28xx_audio_setup(dev); 2659 if (ret < 0) { 2660 dev_err(&dev->intf->dev, 2661 "%s: Error while setting audio - error [%d]!\n", 2662 __func__, ret); 2663 goto unregister_dev; 2664 } 2665 if (dev->audio_mode.ac97 != EM28XX_NO_AC97) { 2666 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2667 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); 2668 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2669 V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f); 2670 } else { 2671 /* install the em28xx notify callback */ 2672 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE), 2673 em28xx_ctrl_notify, dev); 2674 v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME), 2675 em28xx_ctrl_notify, dev); 2676 } 2677 2678 /* wake i2c devices */ 2679 em28xx_wake_i2c(dev); 2680 2681 /* init video dma queues */ 2682 INIT_LIST_HEAD(&dev->vidq.active); 2683 INIT_LIST_HEAD(&dev->vbiq.active); 2684 2685 if (dev->has_msp34xx) { 2686 /* Send a reset to other chips via gpio */ 2687 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7); 2688 if (ret < 0) { 2689 dev_err(&dev->intf->dev, 2690 "%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n", 2691 __func__, ret); 2692 goto unregister_dev; 2693 } 2694 usleep_range(10000, 11000); 2695 2696 ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff); 2697 if (ret < 0) { 2698 dev_err(&dev->intf->dev, 2699 "%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n", 2700 __func__, ret); 2701 goto unregister_dev; 2702 } 2703 usleep_range(10000, 11000); 2704 } 2705 2706 /* set default norm */ 2707 v4l2->norm = V4L2_STD_PAL; 2708 v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm); 2709 v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT; 2710 2711 /* Analog specific initialization */ 2712 v4l2->format = &format[0]; 2713 2714 maxw = norm_maxw(dev); 2715 /* 2716 * MaxPacketSize for em2800 is too small to capture at full resolution 2717 * use half of maxw as the scaler can only scale to 50% 2718 */ 2719 if (dev->board.is_em2800) 2720 maxw /= 2; 2721 2722 em28xx_set_video_format(dev, format[0].fourcc, 2723 maxw, norm_maxh(dev)); 2724 2725 video_mux(dev, 0); 2726 2727 /* Audio defaults */ 2728 dev->mute = 1; 2729 dev->volume = 0x1f; 2730 2731 /* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */ 2732 val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK); 2733 em28xx_write_reg(dev, EM28XX_R0F_XCLK, 2734 (EM28XX_XCLK_AUDIO_UNMUTE | val)); 2735 2736 em28xx_set_outfmt(dev); 2737 2738 /* Add image controls */ 2739 2740 /* 2741 * NOTE: at this point, the subdevices are already registered, so 2742 * bridge controls are only added/enabled when no subdevice provides 2743 * them 2744 */ 2745 if (!v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST)) 2746 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2747 V4L2_CID_CONTRAST, 2748 0, 0x1f, 1, CONTRAST_DEFAULT); 2749 if (!v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS)) 2750 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2751 V4L2_CID_BRIGHTNESS, 2752 -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT); 2753 if (!v4l2_ctrl_find(hdl, V4L2_CID_SATURATION)) 2754 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2755 V4L2_CID_SATURATION, 2756 0, 0x1f, 1, SATURATION_DEFAULT); 2757 if (!v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE)) 2758 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2759 V4L2_CID_BLUE_BALANCE, 2760 -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT); 2761 if (!v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE)) 2762 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2763 V4L2_CID_RED_BALANCE, 2764 -0x30, 0x30, 1, RED_BALANCE_DEFAULT); 2765 if (!v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS)) 2766 v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops, 2767 V4L2_CID_SHARPNESS, 2768 0, 0x0f, 1, SHARPNESS_DEFAULT); 2769 2770 /* Reset image controls */ 2771 em28xx_colorlevels_set_default(dev); 2772 v4l2_ctrl_handler_setup(hdl); 2773 ret = hdl->error; 2774 if (ret) 2775 goto unregister_dev; 2776 2777 /* allocate and fill video video_device struct */ 2778 em28xx_vdev_init(dev, &v4l2->vdev, &em28xx_video_template, "video"); 2779 mutex_init(&v4l2->vb_queue_lock); 2780 mutex_init(&v4l2->vb_vbi_queue_lock); 2781 v4l2->vdev.queue = &v4l2->vb_vidq; 2782 v4l2->vdev.queue->lock = &v4l2->vb_queue_lock; 2783 2784 /* disable inapplicable ioctls */ 2785 if (dev->is_webcam) { 2786 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD); 2787 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_STD); 2788 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_STD); 2789 } else { 2790 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM); 2791 } 2792 if (dev->tuner_type == TUNER_ABSENT) { 2793 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_TUNER); 2794 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_TUNER); 2795 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_FREQUENCY); 2796 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_FREQUENCY); 2797 } 2798 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) { 2799 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_AUDIO); 2800 v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_AUDIO); 2801 } 2802 2803 /* register v4l2 video video_device */ 2804 ret = video_register_device(&v4l2->vdev, VFL_TYPE_GRABBER, 2805 video_nr[dev->devno]); 2806 if (ret) { 2807 dev_err(&dev->intf->dev, 2808 "unable to register video device (error=%i).\n", ret); 2809 goto unregister_dev; 2810 } 2811 2812 /* Allocate and fill vbi video_device struct */ 2813 if (em28xx_vbi_supported(dev) == 1) { 2814 em28xx_vdev_init(dev, &v4l2->vbi_dev, &em28xx_video_template, 2815 "vbi"); 2816 2817 v4l2->vbi_dev.queue = &v4l2->vb_vbiq; 2818 v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock; 2819 2820 /* disable inapplicable ioctls */ 2821 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_PARM); 2822 if (dev->tuner_type == TUNER_ABSENT) { 2823 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_TUNER); 2824 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_TUNER); 2825 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_FREQUENCY); 2826 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_FREQUENCY); 2827 } 2828 if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) { 2829 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_AUDIO); 2830 v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_AUDIO); 2831 } 2832 2833 /* register v4l2 vbi video_device */ 2834 ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI, 2835 vbi_nr[dev->devno]); 2836 if (ret < 0) { 2837 dev_err(&dev->intf->dev, 2838 "unable to register vbi device\n"); 2839 goto unregister_dev; 2840 } 2841 } 2842 2843 if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) { 2844 em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template, 2845 "radio"); 2846 ret = video_register_device(&v4l2->radio_dev, VFL_TYPE_RADIO, 2847 radio_nr[dev->devno]); 2848 if (ret < 0) { 2849 dev_err(&dev->intf->dev, 2850 "can't register radio device\n"); 2851 goto unregister_dev; 2852 } 2853 dev_info(&dev->intf->dev, 2854 "Registered radio device as %s\n", 2855 video_device_node_name(&v4l2->radio_dev)); 2856 } 2857 2858 /* Init entities at the Media Controller */ 2859 em28xx_v4l2_create_entities(dev); 2860 2861 #ifdef CONFIG_MEDIA_CONTROLLER 2862 ret = v4l2_mc_create_media_graph(dev->media_dev); 2863 if (ret) { 2864 dev_err(&dev->intf->dev, 2865 "failed to create media graph\n"); 2866 em28xx_v4l2_media_release(dev); 2867 goto unregister_dev; 2868 } 2869 #endif 2870 2871 dev_info(&dev->intf->dev, 2872 "V4L2 video device registered as %s\n", 2873 video_device_node_name(&v4l2->vdev)); 2874 2875 if (video_is_registered(&v4l2->vbi_dev)) 2876 dev_info(&dev->intf->dev, 2877 "V4L2 VBI device registered as %s\n", 2878 video_device_node_name(&v4l2->vbi_dev)); 2879 2880 /* Save some power by putting tuner to sleep */ 2881 v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, standby); 2882 2883 /* initialize videobuf2 stuff */ 2884 em28xx_vb2_setup(dev); 2885 2886 dev_info(&dev->intf->dev, 2887 "V4L2 extension successfully initialized\n"); 2888 2889 kref_get(&dev->ref); 2890 2891 mutex_unlock(&dev->lock); 2892 return 0; 2893 2894 unregister_dev: 2895 if (video_is_registered(&v4l2->radio_dev)) { 2896 dev_info(&dev->intf->dev, 2897 "V4L2 device %s deregistered\n", 2898 video_device_node_name(&v4l2->radio_dev)); 2899 video_unregister_device(&v4l2->radio_dev); 2900 } 2901 if (video_is_registered(&v4l2->vbi_dev)) { 2902 dev_info(&dev->intf->dev, 2903 "V4L2 device %s deregistered\n", 2904 video_device_node_name(&v4l2->vbi_dev)); 2905 video_unregister_device(&v4l2->vbi_dev); 2906 } 2907 if (video_is_registered(&v4l2->vdev)) { 2908 dev_info(&dev->intf->dev, 2909 "V4L2 device %s deregistered\n", 2910 video_device_node_name(&v4l2->vdev)); 2911 video_unregister_device(&v4l2->vdev); 2912 } 2913 2914 v4l2_ctrl_handler_free(&v4l2->ctrl_handler); 2915 v4l2_device_unregister(&v4l2->v4l2_dev); 2916 err: 2917 dev->v4l2 = NULL; 2918 kref_put(&v4l2->ref, em28xx_free_v4l2); 2919 mutex_unlock(&dev->lock); 2920 return ret; 2921 } 2922 2923 static struct em28xx_ops v4l2_ops = { 2924 .id = EM28XX_V4L2, 2925 .name = "Em28xx v4l2 Extension", 2926 .init = em28xx_v4l2_init, 2927 .fini = em28xx_v4l2_fini, 2928 .suspend = em28xx_v4l2_suspend, 2929 .resume = em28xx_v4l2_resume, 2930 }; 2931 2932 static int __init em28xx_video_register(void) 2933 { 2934 return em28xx_register_extension(&v4l2_ops); 2935 } 2936 2937 static void __exit em28xx_video_unregister(void) 2938 { 2939 em28xx_unregister_extension(&v4l2_ops); 2940 } 2941 2942 module_init(em28xx_video_register); 2943 module_exit(em28xx_video_unregister); 2944